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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated MMBTA05-7-F

Name: MMBTA05-7-F
Brand: Diodes Incorporated
SKU: MMBTA05-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA05-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: MMBTA05-7-F.pdf

Description:: TRANS NPN 60V 0.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:120,715

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Product details

Overview

MMBTA05-7-F from Diodes Incorporated is an NPN medium-power bipolar junction transistor in SOT23 package, rated for 60 V V_CEO, 500 mA I_C, and 310 mW P_D, optimized for low-power amplification and switching in signal conditioning and interface circuits.

For engineers reviewing the MMBTA05-7-F datasheet, MMBTA05-7-F pinout, MMBTA05-7-F application, or MMBTA05-7-F equivalent, key selection criteria include DC current gain (h_FE ≥ 100 at 10 mA), V_CE(sat) ≤ 0.25 V at I_C/I_B = 100 mA/10 mA, f_T = 100 MHz, ESD HBM rating of 4 kV, and SOT23 thermal resistance (R_θJA = 403 °C/W on minimum pad layout).

Technical Context

This NPN transistor uses epitaxial planar die construction to ensure stable gain and low saturation voltage across temperature. Its complementary PNP pair is MMBTA55, enabling push-pull configurations in driver stages.

Designed for operation from –55°C to +150°C, it supports continuous collector current up to 500 mA with pulsed capability to 1 A, and exhibits robust ESD immunity (4 kV HBM, 400 V MM) suitable for board-level handling in industrial assembly environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum safe collector-emitter voltage before breakdown under open-base conditions.
I_C	500 mA - Continuous DC collector current rating defining linear and switching load capacity.
P_D	310 mW - Power dissipation limit on standard FR4 PCB with minimum copper pad; determines thermal headroom.
h_FE	100 min @ 10 mA - Minimum DC current gain ensures reliable base drive sizing in amplifier and switch designs.
V_CE(sat)	≤ 0.25 V @ 100 mA/10 mA - Low saturation voltage minimizes conduction loss in switching applications.
f_T	100 MHz - Gain-bandwidth product enables use in audio-frequency amplifiers and fast digital switching.
ESD HBM	4,000 V - Human Body Model rating confirms robustness against common electrostatic discharge events during handling.

Pinout & Package

Package: SOT23 - surface-mount, 3-pin plastic package with matte tin-plated leads, UL 94V-0 rated, 0.008 g weight, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Reference node for biasing; connects to ground or low-side return path in common-emitter configurations.
2 (Base)	Control input	Accepts current-limited drive to modulate collector current; requires series resistor for digital logic interfacing.
3 (Collector)	Current source terminal	Delivers switched or amplified output current; connects to load and supply rail in active or saturated operation.

Key Features

Feature	Design Value
Epitaxial planar die construction	Ensures tight parameter distribution and stable h_FE over temperature and lifetime.
Complementary PNP pairing (MMBTA55)	Enables matched push-pull output stages without external gain balancing.
Lead-free & RoHS 3 compliant	Meets global environmental regulations including EU Directive 2015/863/EU for bromine/chlorine/antimony limits.
SOT23 thermal performance	R_θJA = 403 °C/W allows operation up to +125°C ambient with minimal derating on standard PCB layouts.

Applications

Audio Signal Amplification

Microcontroller GPIO Interface

Use Scenario: Amplifying line-level analog signals in portable audio preamps and sensor signal chains.

IC Role / Device Role / Timing Role: NPN small-signal amplifier operating in common-emitter configuration with fixed bias or emitter degeneration.

Use Value: Delivers >100 h_FE and <0.25 V V_CE(sat) to maintain signal fidelity and minimize distortion at 10–100 mA collector currents.

Use Scenario: Level-shifting and driving LEDs, relays, or MOSFET gates from 3.3 V or 5 V microcontroller outputs.

IC Role / Device Role / Timing Role: Low-side switch controlled by MCU GPIO, configured in common-emitter saturation mode.

Use Value: Supports 500 mA load current with ≤0.25 V dropout, enabling efficient drive of 20 mA LEDs or 100 mA solenoids without external driver ICs.

Industrial Sensor Interface

Power Supply Enable Control

Use Scenario: Conditioning and buffering analog outputs from temperature, pressure, or current-loop sensors.

IC Role / Device Role / Timing Role: Emitter-follower buffer or current-source driver providing low-output-impedance signal delivery.

Use Value: Stable h_FE and –55°C to +150°C operating range ensure reliable performance in unregulated industrial enclosures.

Use Scenario: Enabling/disabling secondary power rails (e.g., 3.3 V, 1.8 V) via enable inputs of DC-DC converters or LDOs.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling EN pin bias with precise threshold control.

Use Value: 4 kV ESD HBM rating prevents latch-up or damage during hot-plug or field maintenance operations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT2222A-7-F	V_CEO = 40 V, h_FE = 100–300, R_θJA = 357 °C/W (15 mm × 15 mm pad)	Lower voltage rating limits use in 48 V systems; higher gain spread increases design margining effort.	Select when lower V_CEO suffices and tighter thermal resistance is needed on larger PCB areas.
PN2222A	TO-92 package, V_CEO = 40 V, P_D = 625 mW, non-RoHS-3 compliant	Through-hole mounting only; incompatible with automated SMT assembly; lacks green/halogen-free certification.	Choose only for legacy through-hole prototyping where RoHS-3 compliance is not required.

Compared with MMBTA05-7-F, MMBT2222A-7-F offers better thermal performance but reduced voltage margin, while PN2222A sacrifices SMT compatibility and environmental compliance for higher power in through-hole form - making MMBTA05-7-F optimal for modern RoHS-compliant, space-constrained industrial and consumer SMT designs.

Availability

MMBTA05-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller GPIO expansion, audio signal amplification, and power rail enable control requiring stable component supply and full RoHS 3 compliance.

Supply support for MMBTA05-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, environmentally compliant components for industrial, computing, and consumer markets.

The MMBTA05-7-F belongs to Diodes' general-purpose bipolar transistor product line, designed specifically for cost-sensitive, space-constrained SMT applications demanding consistent gain, low saturation voltage, and robust ESD tolerance.

FAQ

What is the maximum continuous collector current for MMBTA05-7-F?

The MMBTA05-7-F is rated for 500 mA continuous collector current (I_C) at T_A = +25°C on a minimum recommended pad layout. Derating applies above 25°C ambient per the published curve - e.g., ~350 mA at +85°C and ~200 mA at +125°C - based on its R_θJA = 403 °C/W thermal resistance.

Is MMBTA05-7-F pin-compatible with MMBTA06-7-F?

Yes - both share identical SOT23 pinout (Emitter-Base-Collector on pins 1–2–3) and mechanical footprint. However, MMBTA06-7-F has higher voltage ratings (V_CEO = 80 V, V_CBO = 80 V) and same I_C/P_D, making it a direct upgrade where higher breakdown is required without layout change.

Does MMBTA05-7-F support automotive applications?

No - the standard MMBTA05-7-F is not qualified to AEC-Q101. Diodes offers the automotive-grade MMBTA05Q variant (separate datasheet DS30037Q) with enhanced testing, PPAP support, and guaranteed operation across –40°C to +150°C with tighter parametric limits.

What is the typical V_BE(on) at I_C = 100 mA?

The datasheet specifies V_BE(on) ≤ 1.2 V at I_C = 100 mA and V_CE = 1.0 V. Typical curves show ~0.85–0.95 V at 25°C, rising to ~1.05 V at –50°C and falling to ~0.75 V at +150°C - critical for accurate base resistor calculation in temperature-varying environments.

MMBTA05-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 10mA, 100mA

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 1V

Power - Max:: 300 mW

Frequency - Transition:: 100MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

MMBTA05-7-F FAQ

1.How can I place an order for MMBTA05-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA05-7-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MMBTA05-7-F reliable?

The price and inventory of MMBTA05-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA05-7-F is usually 5 days.

3.What payment methods are accepted for MMBTA05-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA05-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA05-7-F?

MMBTA05-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA05-7-F order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MMBTA05-7-F?

For technical support, including MMBTA05-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA05-7-F requirements.

6.How does Aetrix verify that MMBTA05-7-F is sourced from the original manufacturer or authorized distributors?

All MMBTA05-7-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBTA05-7-F meets industry standards.

7.What is the process for return or replacement of MMBTA05-7-F?

All MMBTA05-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA05-7-F, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MMBTA05-7-F part is unused and in its original packaging.

Return procedure for MMBTA05-7-F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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